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Finding the Fourth Proportional to 663,670.40, 995,505.60 and 220,438.40

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Solution

The fourth proportional to 663,670.40, 995,505.60 and 220,438.40 is: 330,657.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,670.40 : 995,505.60 = 220,438.40 : x
  2. Step 2: Convert to fraction form
    663,670.40/995,505.60 = 220,438.40/x
  3. Step 3: Cross multiply
    663,670.40x = 995,505.60 × 220,438.40
  4. Step 4: Simplify right side
    663,670.40x = 219,447,661,655.04
  5. Step 5: Solve for x
    x = 219,447,661,655.04/663,670.40
  6. Step 6: Final answer
    x = 330,657.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.